| 摘要 |
[Problem] To provide a porous hollow fiber membrane which is capable of efficiently separating and removing a substance to be removed such as a small-diameter virus contained in a solution, while efficiently transmitting a useful substance to be recovered such as a high-concentration protein at the same time. [Solution] A porous hollow fiber membrane of the present invention is characterized by being composed of two components, namely a polysulfone polymer and a copolymer of vinyl pyrrolidone and vinyl acetate and by having an inner diameter of from 150 µm to 300 µm (inclusive) and a film thickness of more than 50 µm but 80 µm or less. The porous hollow fiber membrane is also characterized by having an asymmetric structure that has a dense layer as an outer layer. |
